Antiskid brake



M. H. FAHRNEY.

ANTISKID BRAKE.

APPLICATION FIILED NOV. 11, 19 20.

1A32 594L v Patented 00$. 17,1g22.

2 SHEETS-SHEET M. H. FAHRNEY.

ANTISKID BRAKE.

APPLICATION FILED NOV. 1!, 1920.

1L,4L32,5%, Patented. 0012.17,]1922.

2 SHEETSSHEET 2.

Patented @ct. 1?, 1922.

MILTON E. FAERNEY, O1? HOLLYWOOD, CALIFORNIA.

ANTISKID BRAKE.

Application filed November 11, 1920.

To all whom it may concern:

Be it known that I, MILTON H. FAHRNEY, a citizen of the United States, residing at Hollywood, in the county of Los Angeles and State of California, have invented new and useful Improvements in Antiskid Brakes, of whiehthe following is a specification.

This invention is a braking device for motor vehicles and the like, which is arranged to prevent skidding when the brakes are applied, and has for its object the provision of a shoe normally in inoperative position out of engagement with the ground and arranged to be readily lowered so as to engage the ground and thus form an antiskid brake for the vehicle.

The invention will be readily understood from the following description of the accompanying drawings, in which:

Figure 1 is a side elevation showing a part of the frame of an automobile with the antiskidding device in operative position.

Fig. 2 is a fragmentary side elevation showing the device in inoperative position.

Fig. 3 is a rear view of the same with the device in operative position.

Fig. 1 is a bottom plan view of the antiskidding device.

Fig. 5 is a detail section through the same on the line 5-5 of Fig. 4.

Fig. 6 is a rear view of the operating lever for the device.

Fig 7 is a side elevation of the same.

In the drawings I have shown the frame of the motor vehicle at 1,.said frame supporting the rear axle housing 2 and differential housing 3 with the wheels 4 carried by the rear axle. The antiskidding device is mounted between the rear wheels and is suspended from the rear axle housing.

As an instance of this arrangement clips 5 may be detachably mounted upon the rear axle housing at the respective ends of the differential housing 3. The arms 6 of a clevis are pivoted to the respective clips as by bolts 7. The arms of the clevis may be braced as shown at 8 and the swingingends of these arms extend alongside of one another and are arranged as tubes 9 in which rodslO telescope. The rods 10 may be fixed in adjusted telescoped position by means of saidscrews 11.

The ground engaging shoe of the anti- Serial No. 423,310.

skidding device is shown at 12 provided with upwardly projecting transversely spaced lugs 13. A rock rod 14: is journaled in the lugs 13 and the rods 10 are journaled upon this rock rod, as clearly shown in Fig. 5.

A toe 15 is provided at the front of the shoe 12 and springs 16 are arranged with their ends fixed to rods 10 and to the shoe 12 so as to normally swing the shoe into the position shown in Fig. 5, where the lower surface of the shoe is substantially parallel to the ground and the toe 15 curves upwardly therefrom.

The base of the shoe comprises plate 17 which is readily removable and replaceable by means of the bolts 18. This plate is, preferably, provided with dependingribs 19 extending from. front to rear of plate 17, and a slot 20 is, preferably, provided in the plate between the ribs. A wheel 21 is journaled upon a shaft 22 within shoe 12 so that the periphery thereof projects through the slot 20 into position to first engage the ground when the shoe is low ered. This wheel is so mounted as to readily yield into retracted position within shoe 12 so that the ribs 19 of plate 17 may readily engage the ground. For this purpose the shaft 22 is supported by the free end of a spring 23 which isiixed at its opposite end to the shoe 12 as by a bolt 24.

The antiskid shoe is normally retained in inoperative position as shown in Fig. 2, and the clevis supporting thesame is swung upon the pivots provided by bolt 7 when it is desired to lower the shoe to the ground engaging position shown in Fig. 1. The mechanism for swinging the clevis includes a retaining rod 25 which may be adjustably supported by the pivot bolts 7. For this purpose the central portion of the retaining rod projects rearwardly from the axle housing 2 so as to be engaged by a clip 30 carried by the antiskid shoe when the latter is lowered. The ends of the retaining rod are angularly disposed and are supported by the respective bolts 7. For this purpose the ends of the rod are received over the bolts 7 and are provided with corrugated surfaces 26 co-operating with corrugated surfaces 27 upon the clips 5, so that when the nuts 28 which are received upon the bolts 7 are tightened, the ends of the rod 25 will be clamped in pivotally adjusted positions with relation to the clips 5. The central portion of the retaining rodiadapted to be engaged by the clip 30 carried by the antiskid shoe may thus be vertically adjusted to bring the retaining rod into proper position to be engaged by the clip 30.

The clip 30 is carried by a clip carrying arm 31 which is, preferably,,longitudinally adjustable with relationto one arm32 of a bell crank lever as by having a bolt 33 supported by the arm 32 of the bell crank lever received through any one of a series of openings 'Mprovided in the clip carrying arm 81. The bell crank lever ispivoted as shown at 35 to lugs 36 projecting upwardly from rock rod 14. The outer end'of the bell crank lever shown at 37 isconnected toan actuating cable 88 which is provided withsuitable means shown at 39 for adjust ingthe length of said cable.

" When the antiskid shoe isin inoperative position the clip 30 is engaged by the retaining rodj25 so as to prevent downward swing of theshoe, and when the. bell crank lever is rocked through pull exerted upon the cable. 38, the clip 30 is withdrawn from retaining rod 25 so as to permit the antiskid shoe to swing downwardlylto theposition shown in Fig, l. vl/Vith the parts in the vpositionshown in Fig. 1' additional pull upon the cable 38 will swing the clevis s'up porting the antiskid shoe morenea-rly into a vertical position and the engagement of purposea shaft 40 may extend laterally from theframe 1 adjacent the drivers seat, said shaft being journaled in a bearing 41. vThe shaft is providedaw ith an arcuate plate 42 and with a crank arm 4L3 to which the cable 38 is connected. A spring-a l is interposed between the frame of the vehicle and the arcuate platel-2 so as toinormally turn the shaft 40 toa position whereno pull s exerted upon cable 38.

The mechanism for manually notating shaft .410 against the action of spring 4A and-thus pullingcable 38 may include a lever d5 j ournaled upon 'shaft 40 and .pro-

vvided at its free end 'with alliandle 4C6.

pawl 4:7 igacarried by lever and is arranged to engage aratohet d8 upon'the arcuate plate 4-2. This pawl normally env gages v the v ratchet and isga dapted I to be re- .leased by I push. rode!) arranged convenient to handle {146. It. willtlnrs-be seen that the lever 45 engaging the arcuate plate 42 extends along the frame of the motor'vevided for. cable 50in order to take up the through the pawl and ratchet connection will permit shaft 40 to be manually rotated so as to exert pull upon cable 38 for releasing the antiskid shoe. When the lever-has been moved as far as possible by releasing the pawl and ratchetconnection, a new grip upon the arcuate plate may be obtained by the-lever for continuing the pull upon cable 38 so as to complete the movement of the antiskid shoe'to-its operative position.

Means are provided for returning the antiskid, shoe to its inoperative position, and in the present inventionI have shown such means as comprising a cable 50. This cable hicle over suitable pulleys '51, and at its forward end projects through'an opening 52 in the floor board of the motor 'vehic'le so as, to be readily; grasped by the driver of the machine. For this purpose a handle 53 The opposite end or the cableextends downwardlyabove the clevis carrying the'antiskid shoe, and at its end is connected to a loop 54 which, preferably,ispivoted-upon a transverse rod '55 received between the two portions 9 of the c'levisarrns 6, Bythis arrangementit willlbeseen that the clevis carrying the .antiskid shoe maybe readily swung back up to its, inoperative position so .may be provided upon the end of the cable.

that the clip ,30 will-engage thefil'fltaining rod 25 by simply pulling uponthe "handle connected toflcable 50.

A tensioning device is, preferfbly proslack in thecable and, thus prevent rattling or undue vibration of the parts forming the .antiskid device. For this purpose a spring 5 F is fixed at one enduponaclamp 55 whiehtniay bereceived around a part of the motor vehicle shown as the mainshaft housing 56,- The opposite end of thespring forms hook 57 adapted tojbereceived over cable v 5.0 between two of its supp orting pulleys, andthe spring is, ofsuch tension as to draw downupon the cablet'ortaking up the slack-therein. .T he clamp 55 may also be, utilized. to support a pulley 58 forming a guideforthe cable 38.

-.Var ious:.changes may be. made without departin from the, spirit of thefinvention as claimed.

VVhat. is claimed is:

1. The combination with. a vehicle, of an antiskid device including a pivoted support and a shoe carriedrthereby, a retaining rod i'orthe antiskid device, a clip ,oarriedby the latter :and. adapted .to engagetheretaining rod, and means. for adjusting. the 7 retaining rod. relative, to said. clip.

7 2- he qc mbmatioli *W th. a vehicle, oifen ant slnd dev ce having releasable meansfor skid device toinoperative position after reretaining the same in inoperative position, v a flexible. connection, 01. return ng the antilease thereof, and means for tensioning said pivotal mounting for said support, so as to flexible connection. permit of adjustment of said retaining rod 3. The combination with a Vehicle, of an relative to said clip, said clip being adapted l0 antiskid device including a bracket, a supto releasably engage said retaining rod. 5 port pivoted to the same, a shoe carried by In testimony whereof I have signed my said support, a clip on said shoe, a retainname to this specification. ing rod connected to the bracket by the MILTON H. FAHRNEY. 

